Observing and braiding topological Majorana modes on programmable quantum simulators.

Electrons are indivisible elementary particles, yet paradoxically a collection of them can act as a fraction of a single electron, exhibiting exotic and useful properties. One such collective excitation, known as a topological Majorana mode, is naturally stable against perturbations, such as unwanted local noise, and can thereby robustly store quantum information. As such, Majorana modes serve as the basic primitive of topological quantum computing, providing resilience to errors. However, their demonstration on quantum hardware has remained elusive. Here, we demonstrate a verifiable identification and braiding of topological Majorana modes using a superconducting quantum processor as a quantum simulator. By simulating fermions on a one-dimensional lattice subject to a periodic drive, we confirm the existence of Majorana modes localized at the edges, and distinguish them from other trivial modes. To simulate a basic logical operation of topological quantum computing known as braiding, we propose a non-adiabatic technique, whose implementation reveals correct braiding statistics in our experiments. This work could further be used to study topological models of matter using circuit-based simulations, and shows that long-sought quantum phenomena can be realized by anyone in cloud-run quantum simulations, whereby accelerating fundamental discoveries in quantum science and technology.

Knowledge, attitudes and practices concerning breast cancer, cervical cancer and screening among healthcare professionals and students in Mogadishu, Somalia: a cross-sectional study.

Introduction: Somali women face exceptionally high mortality and incidence rates from both breast cancer (BC) and cervical cancer (CC). They experience the highest age-standardised BC mortality rate in Africa and an age-standardised BC incidence rate of 41.7 per 100,000 women. Somalia's second-highest cancer-related mortality and incidence rates are due to CC, both behind BC. It is critical to identify the underlying factors that may influence healthcare workers' management of both cancers. At present, there is a lack of evidence regarding providers' knowledge of these two cancers and their screening in Somalia. Methods: A cross-sectional questionnaire was administered with a purposive sampling strategy to 469 healthcare professionals and students and was completed by 405 (86%). Healthcare workers were recruited from Mogadishu-based hospitals. Results: One hundred and ninety-seven healthcare professionals and 207 students completed the survey and were included in the analysis. 89% and 73% of respondents demonstrated good knowledge of BC and CC, respectively. Only 46% knew that a vaccine could prevent CC, and 89% of healthcare professionals disagreed that human papillomavirus (HPV) vaccines were available to their patients. Attitudes towards cancer screening, in addition to breast self-examination (BSE), were overwhelmingly positive. For both BC and CC, 24% reported having treated a patient and 30% reported having conducted a screen for either disease. Conclusion: Overall, while knowledge of both diseases and screening was good, there remain areas for clear educational targeting such as HPV vaccine availability and BC preventability. Attitudes to screening for both diseases were exceedingly positive but, with the exception of BSE, failed to translate into practice due to inadequate resources and patient refusal. Future investments into Somalia's chronic care management should prioritise technology necessary to conduct screenings for both diseases, expanding HPV vaccine access and understanding patients' potential motivations for refusing screening.

COVID-19 vaccine perceptions in the initial phases of US vaccine roll-out: an observational study on reddit.

BACKGROUND: Open online forums like Reddit provide an opportunity to quantitatively examine COVID-19 vaccine perceptions early in the vaccine timeline. We examine COVID-19 misinformation on Reddit following vaccine scientific announcements, in the initial phases of the vaccine timeline. METHODS: We collected all posts on Reddit (reddit.com) from January 1 2020 - December 14 2020 (n=266,840) that contained both COVID-19 and vaccine-related keywords. We used topic modeling to understand changes in word prevalence within topics after the release of vaccine trial data. Social network analysis was also conducted to determine the relationship between Reddit communities (subreddits) that shared COVID-19 vaccine posts, and the movement of posts between subreddits. RESULTS: There was an association between a Pfizer press release reporting 90% efficacy and increased discussion on vaccine misinformation. We observed an association between Johnson and Johnson temporarily halting its vaccine trials and reduced misinformation. We found that information skeptical of vaccination was first posted in a subreddit (r/Coronavirus) which favored accurate information and then reposted in subreddits associated with antivaccine beliefs and conspiracy theories (e.g. conspiracy, NoNewNormal). CONCLUSIONS: Our findings can inform the development of interventions where individuals determine the accuracy of vaccine information, and communications campaigns to improve COVID-19 vaccine perceptions, early in the vaccine timeline. Such efforts can increase individual- and population-level awareness of accurate and scientifically sound information regarding vaccines and thereby improve attitudes about vaccines, especially in the early phases of vaccine roll-out. Further research is needed to understand how social media can contribute to COVID-19 vaccination services.

Knowledge of and preparedness for COVID-19 among Somali healthcare professionals: A cross-sectional study.

BACKGROUND: Somalia is considered severely underprepared to contain an outbreak of COVID-19, with critical shortages in healthcare personnel and treatment resources. In limited-resource settings such as Somalia, providing healthcare workers with adequate information on COVID-19 is crucial to improve patient outcomes and mitigate the spread of the SARS-CoV-2 virus. This study assessed the knowledge of, preparedness for, and perceptions toward COVID-19 prevention and treatment among Somali healthcare workers. METHODS: A descriptive, cross-sectional survey was completed by 364 Somali healthcare workers in summer of 2020 utilizing a convenience sampling method. RESULTS: Participants' most accessed sources of COVID-19 information were from social media (64.8%), official government and international health organization websites (51.1%,), and traditional media sources such as radio, TV, and newspapers (48.1%). A majority of participants demonstrated strong knowledge of treatment of COVID-19, the severity of COVID-19, and the possible outcomes of COVID-19, but only 5 out of 10 symptoms listed were correctly identified by more than 75% of participants. Although participants indicated seeing a median number of 10 patients per week with COVID-19 related symptoms, access to essential medical resources, such as N95 masks (30.2%), facial protective shields (24.5%), and disposable gowns (21.4%), were limited. Moreover, 31.3% agreed that Somalia was in a good position to contain an emerging outbreak of COVID-19. In addition, 40.4% of participants agreed that the Somali government's response to the pandemic was sufficient to protect Somali healthcare professionals. CONCLUSION: This study provides evidence for the need to equip Somali healthcare providers with more information, personal protective equipment, and treatment resources such that they can safely and adequately care for COVID-19 patients and contain the spread of the virus. Social media and traditional news outlets may be effective outlets to communicate information regarding COVID-19 and the Somali government's response to frontline healthcare workers.

Knowledge and perceptions of COVID-19, prevalence of pre-existing conditions and access to essential resources in Somali IDP camps: a cross-sectional study.

OBJECTIVES: This study examined knowledge and perceptions of COVID-19, prevalence of pre-existing conditions and access to essential resources among residents of internally displaced person (IDP) camps in Somalia, where overcrowded settlements with weakened infrastructure, inadequate water, sanitation, and hygiene facilities, and limited access to health services make this vulnerable population particularly susceptible to a COVID-19 outbreak. DESIGN: A descriptive, cross-sectional survey. SETTING: Twelve IDP camps across six areas of the Lower Shabelle region in Somalia. PARTICIPANTS: 401 adult Somali IDP camp residents. RESULTS: The majority of participants were female (86%) and had received no formal education (89%). While 58% reported being in 'good' health, half of the participants reported having one or more pre-existing conditions. Though 77% of respondents reported taking at least one COVID-19 preventative public health measure, respondents reported a lack of access to adequate sanitation, an inability to practice social distancing and nearly universal inability to receive a COVID-19 screening exam. Questions assessing knowledge surrounding COVID-19 prevention and treatment yielded answers of 'I don't know' for roughly 50% of responses. The majority of participants were not familiar with basic information about the virus or confident that they could receive medical services if infected. 185 (47%) respondents indicated that camp living conditions needed to change to prevent the spread of COVID-19. CONCLUSION: This study highlights low levels of COVID-19 knowledge and limited access to essential prevention and treatment resources among individuals living in Somali IDP camps. A massive influx of additional resources is required to adequately address COVID-19 in Somalia, starting with codesigning interventions to educate those individuals most vulnerable to infection.